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Ms Vicky McCartney Project No 880-040 IA December 8, 2003 Page 4 FIELD ACTIVITIES To evaluate the vertical and lateral extent of dissolved petroleum hydrocarbons and MtBE in groundwater, Shaw advanced four CPT borings at and in the vicinity of the site Prior to the initiation of fieldwork, drilling permits were obtained from the SJCEHD and an encroachment permit was obtained from the City of Stockton Copies of the permits (#35000, #35001, #35002, and #67769) are included in Attachment A Underground Service Alert (USA) was notified at least 48 hours prior to the commencement of field activities, and a private subsurface utility locating service was contracted to locate subsurface utilities at the boring locations A site-specific Health and Safety Plan was prepared in general accordance with 29 CFR 1910 120 and Tale 8, California Code of Regulations, Section 5192 The Health and Safety Plan included safety procedures for work to be performed at the site, chemical hazard information, site safety officers, and preferred medical emergency locations CPT Borings On September 2 and 3, 2003, Shaw observed the advancement of four CPT borings (CPT-1 through CPT-4) at the locations shown on Figure 2 The CPT borings were advanced to a total depth of 90 feet bgs Following the completion at each CPT boring, the rig was moved over approximately five feet and a hydropunch boring was advanced Four discrete water samples were collected from each hydropunch boring The groundwater samples were submitted to California Laboratory Services (CLS ELAP #1233) for the analysis of TPHg by U S Environmental Petroleum Agency (EPA) Method 8015GRO, BTEX by EPA Method 8021, and for DIPE, ETBE, MtBE, TAME, TBA, ethylene dibromide (EDB), and 1,2-di�chloroethane (1,2-DCA) by EPA Method 8260B The CPT and hydropunch borings filled with grout via tremmie pipe to the surface The borings are presented in Attachment Yp At the conclusion of the tests, the holes were grouted via tremmie pipe up to the surface The boring locations were N\aacDP\20031Pri18818800401A 3aa doc